Question

A gardener want to fence a circular garden of diameter 21m. Find the length of rope he needs to purchase,if he makes 2 rounds of fence. Also find the cost of rope, if it's price is rs. 4.50 per meter.
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Answer 1

Solution:-✔

To find the length of the rope he needs to purchase, if he makes 2 rounds of fence, we need to find the circumference of the circular garden. Circumference of the circular garden is 66 m then it means to fence the garden once the gardener needs 66 m of rope.

Answer 2

ɢɪᴠᴇɴ:

• A gardener want to fence a circular garden of diameter 21m.

ᴛᴏ ꜰɪɴᴅ:

• The length of rope he needs to purchase,if he makes 2 rounds of fence

• The cost of rope, if it's price is rs. 4.50 per meter.

ꜱᴏʟᴜᴛɪᴏɴ:

The Diameter of the circular garden ➙ 21 m

$Radius = {\bf{\frac{21}{2}}}$

Circumference =

${\bf{2\pi r = 2 \times \frac{22}{7} \times \frac{21}{2}}}$

$= \tt\bf\blue{66m}$

$\begin{gathered} \\ \\ \end{gathered}$

ʟᴇɴɢᴛʜ ᴏꜰ ʀᴏᴩᴇ ɴᴇᴇᴅᴇᴅ ꜰᴏʀ 2 ʀᴏᴜɴᴅꜱ:

= 2 × 66m = 132m

$\begin{gathered} \\ \\ \end{gathered}$

ᴄᴏꜱᴛ ᴏꜰ ʀᴏᴩᴇ:

➙ 132 × 4.50

$\rightarrow ₹594$

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